Your record can include two addresses: a Home and/or a mailing address. If you're temporarily living somewhere other than the address recorded as your home (perhaps a local Waterloo address), it is to your advantage to ensure this other (local) address is recorded as your mailing address; otherwise, you may experience unwanted delays in getting important mail.
It is important to keep your address information up-to-date at all times. All your address information should be correct, including the province, postal code, country, etc., otherwise, the mail we send you may not be delivered.